Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
29347Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
528247619.0old
116507591926.82008-08-26 19:59:21
3170688550615267500012168.12008-08-26 19:59:21
8678872720534116458848619338101420135116.12025-10-06 14:40:19
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000001286 / 4588
Estimated T-Level: 36.4
TF below 2^116 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-21Oliver Kruse94B9A20566606C173013
Verified (Factored)2017-10-12kkmrkkblmbrbk94B9A20566606C1732563113
Verified (Factored)2020-04-17Oliver KruseE1FFC5222AEE4B4631667353
Verified (Factored)2024-07-01kkmrkkblmbrbkE1FFC5222AEE4B4632250353
Verified2025-10-06VGDominionE1FFC5222AEE4B4642467253
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2025-10-12VGDominionfactor ECM smallC1S20.00 % 2025-10-12
History
DateUserTypeResult
2025-10-06VGDominionC-PRP
M29347/528247/116507591/317068855061526750001/86788727205341164588486193381014201 : E1FFC5222AEE4B46
PRP: Verified
PRP without proof (small exponent)
2025-10-06VGDominionF-ECM
Factor: 86788727205341164588486193381014201 / (ECM curve 2, B1=4130854, B2=40524178695, Edwards Sigma=5365828475069235)
2024-07-01kkmrkkblmbrbkC-PRP
M29347/116507591/317068855061526750001/528247 : E1FFC5222AEE4B46
PRP: Verified
PRP without proof (small exponent)
2023-02-11nordiNF-PM1
B1=3000000000, B2=925584566816910
2022-09-30nordiNF-PM1
B1=3000000000
2021-05-09ATHNF-PP1
Start=2/7, B1=100000000, B2=10000000000
2020-04-17Oliver KruseC-PRP
M29347/528247/116507591/317068855061526750001 : E1FFC5222AEE4B46
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M29347/528247/116507591/317068855061526750001 : 94B9A20566606C17
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M29347/528247/116507591/317068855061526750001 : 94B9A20566606C17
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M29347/528247/116507591/317068855061526750001 : 94B9A20566606C17
PRP without proof (not generated)
2017-01-03kkmrkkblmbrbkNF-PM1
B1=500000000, B2=10000000000, E=12
2008-08-26-Anonymous-F-ECM
Factor: 317068855061526750001
2008-08-26-Anonymous-F
Factor: 116507591